[R] read.table and column class

[jim holtman]

Define those columns as being character with colClasses and then use
'ifelse' to change it to boolean:

> x <- c("", "", "+", "", "+")
> x
[1] ""  ""  "+" ""  "+"
> y <- ifelse(x == "", FALSE, TRUE)
> y
[1] FALSE FALSE  TRUE FALSE  TRUE
>


On Tue, Apr 15, 2008 at 5:10 AM, Johannes Graumann
<johannes_graumann at web.de> wrote:
> Hi,
> I read in some tabular data using this:
>
> > read.table(file, quote = "\"", header = TRUE, sep = "\t",
> >       stringsAsFactors > = FALSE, comment.char = "")
>
> One slight problem I have now is that some columns in the data set contain
> either "" or "+", which means FALSE or TRUE respectively. The command
> results in those columns being numeric with "NA" corresponding to the empty
> case and "0" to the "+"-case. Is there any smart way of making read table
> rendering these columns boolean to start with?
>
> Thanks for any insight, Joh
>
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>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?